Air pump for aquaria



FIG. 1 is a perspective view;

FIG. 2 is a top view;

FIG. 3 is a right side view (the left side is a mirror image of the right side);

FIG. 4 is a bottom view;

FIG. 5 is a rear view; and,

FIG. 6 is a front view.

The broken lines are for illustration only and form no part of the claimed design. 

The ornamental design for an air pump for aquaria, substantially as shown and described. 